[ GLSA 200710-04 ] libsndfile: Buffer overflow

[Raphael Marichez <falco () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200710-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libsndfile: Buffer overflow
      Date: October 07, 2007
      Bugs: #192834
        ID: 200710-04

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Synopsis
========

A buffer overflow vulnerability has been discovered in libsndfile.

Background
==========

libsndfile is a library for reading and writing various formats of
audio files including WAV and FLAC.

Affected packages
=================

    -------------------------------------------------------------------
     Package                /   Vulnerable   /              Unaffected
    -------------------------------------------------------------------
  1  media-libs/libsndfile      < 1.0.17-r1               >= 1.0.17-r1

Description
===========

Robert Buchholz of the Gentoo Security team discovered that the
flac_buffer_copy() function does not correctly handle FLAC streams with
variable block sizes which leads to a heap-based buffer overflow
(CVE-2007-4974).

Impact
======

A remote attacker could exploit this vulnerability by enticing a user
to open a specially crafted FLAC file or network stream with an
application using libsndfile. This might lead to the execution of
arbitrary code with privileges of the user playing the file.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libsndfile users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libsndfile-1.0.17-r1"

References
==========

  [ 1 ] CVE-2007-4974
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4974

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200710-04.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security () gentoo org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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